<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" type="text/css" href="./css/base.css">
<script src="./js/codergege.js" type="text/javascript"></script> 
<script src="./js/1.js" type="text/javascript"></script> 
<style>
.active { background: red; }
#tab div { width: 200px; height: 200px; border: 10px solid green; 
	border-radius: 10px; display: none; }
</style>
</head>
<body>
<div id="tab">
	<button class="active">1</button>
	<button>2</button>
	<button>3</button>
	<div style="display:block;">001</div>
	<div>002</div>
	<div>003</div>
</div>
</body>
</html>
